gitlab-org--gitlab-foss/lib/gitlab/utils/strong_memoize.rb
gfyoung f93f8f569d Enable even more frozen string for lib/gitlab
Enables frozen string for the following:

* lib/gitlab/patch/**/*.rb
* lib/gitlab/popen/**/*.rb
* lib/gitlab/profiler/**/*.rb
* lib/gitlab/project_authorizations/**/*.rb
* lib/gitlab/prometheus/**/*.rb
* lib/gitlab/query_limiting/**/*.rb
* lib/gitlab/quick_actions/**/*.rb
* lib/gitlab/redis/**/*.rb
* lib/gitlab/request_profiler/**/*.rb
* lib/gitlab/search/**/*.rb
* lib/gitlab/sherlock/**/*.rb
* lib/gitlab/sidekiq_middleware/**/*.rb
* lib/gitlab/slash_commands/**/*.rb
* lib/gitlab/sql/**/*.rb
* lib/gitlab/template/**/*.rb
* lib/gitlab/testing/**/*.rb
* lib/gitlab/utils/**/*.rb
* lib/gitlab/webpack/**/*.rb

Partially addresses gitlab-org/gitlab-ce#47424.
2018-11-19 18:24:22 -08:00

43 lines
1 KiB
Ruby

# frozen_string_literal: true
module Gitlab
module Utils
module StrongMemoize
# Instead of writing patterns like this:
#
# def trigger_from_token
# return @trigger if defined?(@trigger)
#
# @trigger = Ci::Trigger.find_by_token(params[:token].to_s)
# end
#
# We could write it like:
#
# include Gitlab::Utils::StrongMemoize
#
# def trigger_from_token
# strong_memoize(:trigger) do
# Ci::Trigger.find_by_token(params[:token].to_s)
# end
# end
#
def strong_memoize(name)
if instance_variable_defined?(ivar(name))
instance_variable_get(ivar(name))
else
instance_variable_set(ivar(name), yield)
end
end
def clear_memoization(name)
remove_instance_variable(ivar(name)) if instance_variable_defined?(ivar(name))
end
private
def ivar(name)
"@#{name}"
end
end
end
end